TAILIEUCHUNG - Heat Transfer Handbook part 83

Heat Transfer Handbook part 83. The Heat Transfer Handbook provides succinct hard data, formulas, and specifications for the critical aspects of heat transfer, offering a reliable, hands-on resource for solving day-to-day issues across a variety of applications. | HEAT EXCHANGER ANALYSIS METHODS 815 Effectiveness e Effectiveness e Figure Heat exchanger effectiveness as a function of Ntu for 10 heat exchanger arrange- ments. From Kakac 1991 with permission. 816 HEAT EXCHANGERS 5 100 90 80 80 60 70 40 60 20 40 0 Figure Continued Heat exchanger effectiveness as a function of Ntu for 10 heat exchanger arrangements. From Kakac 1991 with permission. HEAT EXCHANGER ANALYSIS METHODS 817 Figure Continued Heat exchanger effectiveness as a function of Ntu for 10 heat exchanger arrangements. From Kakac 1991 with permission. For Cmin Cshen and Cmax Ctube For the effectiveness use eq. with C replaced by 1 C Ntu replaced by C Ntu and replaced by C e When C 1 use eq. and when Ntu ro when Cmin Cshell 2 C 2 C 2 4 1 2 Graphs of the 10 arrangements just considered are shown in Fig. . P-N c Method In shell-and-tube heat exchangers any possible confusion deriving from selection of the Cmin fluid is avoided through use of the P-Ntu c method. The method uses the cold-side capacity rate so that p Cm Cc I C N Cmin N _ i Ntu Ntu c Cc Ntu I NtuC for Cc Cmin for Cc Cmax for Cc Cmin for Cc Cmax

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